EU to Japan ring size converter
Two numeric systems that do not match: an EU size is the inner circumference in mm, while a Japanese size is a JIS number based on inner diameter. An EU 52 is about a Japan 12 and an EU 54 is about a Japan 14. Convert below.
Quick answer
A EU 54 is 14 in Japan (about 54.4 mm inner circumference). Use the converter for your exact size, or the chart below for the full range.
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EU → Japan at a glance
- 47 = 7
- 49 = 9
- 52 = 11
- 54 = 14
- 57 = 16
- 59 = 19
- 62 = 21
- 65 = 24
EU to Japan ring size chart
| EUEU / ISO | JPJapan | mmCircumference | mmDiameter |
|---|---|---|---|
| 47 | 7 | 46.7 | 14.9 |
| 48 | 8 | 48.0 | 15.3 |
| 49 | 9 | 49.3 | 15.7 |
| 51 | 10 | 50.5 | 16.1 |
| 52 | 11 | 51.8 | 16.5 |
| 53 | 13 | 53.1 | 16.9 |
| 54 | 14 | 54.4 | 17.3 |
| 56 | 15 | 55.6 | 17.7 |
| 57 | 16 | 56.9 | 18.1 |
| 58 | 18 | 58.2 | 18.5 |
| 59 | 19 | 59.5 | 18.9 |
| 61 | 20 | 60.7 | 19.3 |
| 62 | 21 | 62.0 | 19.7 |
| 63 | 22 | 63.3 | 20.1 |
| 65 | 24 | 64.6 | 20.5 |
| 66 | 25 | 65.8 | 21.0 |
| 67 | 26 | 67.1 | 21.4 |
Common questions
How do I convert a EU ring size to Japan?
Enter your EU size in the converter above and read the Japan result, or find your row in the chart below. Every value is calculated from the ring’s inner circumference, so it works in both directions.
What is a EU 54 in Japan?
A EU 54 is 14 in Japan. That ring has an inner circumference of about 54.4 mm.
Related conversions
Or see the full ring size chart.